Ex-Biden chief of staff giving 'credible' answers in House Oversight cover-up probe, lawmakers say

Former White House chief of staff Ron Klain is cooperating with congressional investigators seeking information into former President Joe Biden's mental health during his time in office, a pair of lawmakers suggested Thursday.

Klain, who ran Biden's White House for the first two years of his term, is currently sitting down with staff on the House Oversight Committee as part of Chair James Comer's probe into whether top administration aides covered up signs of decline in the former president while he was in office.

Rep. Ro Khanna, D-Calif., told reporters roughly an hour into the session that Klain "answered every question" that Republicans put forward.

Ron Klain, the former White House chief of staff, is on Capitol Hill Thursday. (Andrew Harrer/Bloomberg via Getty Images)

"I found Mr. Klain to be very credible. He answered every single question. He was fully cooperative. There are times where he was asked about personal conversations he had with the president, and he was forthcoming," Khanna said.

"I really appreciate his candor and the comprehensive way he had answered every question."

Rep. Andy Biggs, R-Ariz., told Fox News Digital minutes later when asked if Klain was credible, "Yeah – when I say credible, I think he is telling what he knows accurately. I mean, he's trying to be accurate. So that's what I'd say."

Rep. Ro Khanna was the only Democratic lawmaker seen in the interview. (Anna Moneymaker/Getty Images)

"In my opinion, he is not trying to avoid answering the questions. He's answering the questions carefully. He's saying the things that I kind of expected him to say," Biggs said. "But he's been answering the questions, I think, forthrightly and in the way he sees the world."

In closed-door transcribed interviews, it's common for Republican and Democratic committee staff to each get an hour of questioning at a time, trading off until no more questions remain.

The two lawmakers spoke to reporters after the first hour of GOP questioning was finished.

Rep. Andy Biggs was also in the room during the Republicans' round of questioning. (Getty Images)

That means Klain's interview could go on for several hours.

Comer, R-Ky., is investigating whether Biden's top White House aides concealed signs of mental decline in the then-president, and if that meant executive actions were signed via autopen without his knowledge.

Biden maintained he "made every decision" in a recent interview with The New York Times.